Final answer:
Nutrients are indeed absorbed from the small intestine into the bloodstream; this is a true statement. This essential process of absorption is facilitated by specialized structures called villi and microvilli, which allow the nutrients to enter the circulatory system.
Step-by-step explanation:
The student's question pertaining to whether nutrients are transferred from the small intestine into the bloodstream is accurate. The correct answer is:
The absorption of digested food nutrients primarily occurs in the small intestine. This process involves absorptive cells, which have projections called microvilli that greatly increase the surface area for absorption. The nutrients pass through the epithelial cells and enter the bloodstream or the lymphatic system to be circulated throughout the body. Lipid-soluble nutrients diffuse through the plasma membrane and are subsequently transported via lacteals in the villi into the lymph system, and then to the bloodstream. Meanwhile, water-soluble nutrients require active transport through the mucosa. The small intestine's highly folded surface and finger-like projections, called villi, enhance the efficiency of nutrient absorption, ensuring that nutrients are readily available for the body's needs. Any remaining undigested material proceeds to the large intestine and is eventually eliminated as waste.
From the information provided, we can confirm that the statement is true. The small intestine is the primary site of nutrient absorption in the body. The epithelial cells that make up the mucosa of the small intestine absorb most nutrients from the lumen of the alimentary canal into the bloodstream. Lipids, however, are absorbed into lacteals and are transported through the lymphatic vessels to the bloodstream.